[Webkit-unassigned] [Bug 181033] <img> decode single frame h264 and hevc slower than jpg

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=181033

--- Comment #1 from Jer Noble <jer.noble at apple.com> ---
There is probably more overhead in bringing up an instance of a VTDecompressionSession (and the hardware decoder) for only a single frame of decode than there would be for an equivalent decode of a JPEG. We could look into doing a software-based decode if there's only a single frame and see if that fixes the issue.

There's also the issue where a single-frame MP4-backed <img> will "loop". I wonder if that's causing an issue as well.

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